> For now, this proposal is on hold because
> 1) it isn't clear that it should be done,
> 2) it needs a lot of serious discussion before proceeding,
> 3) it may be premature while the status of the regular dict
> is still in flux.
+1
When writing the C implementation my biggest constraint was compatibility with the Python implementation, including algorithmic complexity. I'm in favor of making use of dict's new ordering, but it's not urgent and Raymond's concerns should be addressed first (particularly since the collections module is his).